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Dynastes hercules

ABSTRACT: Dynastes hercules overview

PROVIDER: PRJNA987010 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	DRR299552_1.fastq.gz	Fastqsanger.gz
	DRR299552_2.fastq.gz	Fastqsanger.gz
	DRR299553_1.fastq.gz	Fastqsanger.gz
	DRR299553_2.fastq.gz	Fastqsanger.gz
	DRR299554_1.fastq.gz	Fastqsanger.gz

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Dynastes hercules

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Dynastes hercules

Project description:Amendment of a thermophile-fermented compost to humus improves the growth of female larvae of the Hercules beetle, Dynastes hercules (Coleoptera: Scarabaeidae).

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A Thermophile-Fermented Compost Modulates Intestinal Cations and the Expression of a Juvenile Hormone-Binding Protein Gene in the Female Larvae of Hercules Beetle Dynastes hercules (Coleoptera: Scarabaeidae).

Project description:The Hercules beetle larvae grow by feeding on humus, and adding a thermophile-fermented compost to the humus can upregulate the growth of female larvae. In this study, the effects of compost on the intestinal environment, including pH, cation concentrations, and organic acid concentrations of intestinal fluids, were investigated, and the RNA profile of the fat body was determined. Although the total intestinal potassium ions were similar between the larvae grown without compost (control larvae) and those with compost (compost larvae), the proportion of potassium ions in the midgut of the compost larvae drastically increased. In the midgut, an unidentified organic acid was the most abundant, and its concentration increased in the compost larvae. Transcriptome analysis showed that a gene encoding hemolymph juvenile-binding protein (JHBP) was expressed in the compost female larvae and not in the control female larvae. Expression of many genes involved in the defensive system was decreased in the compost female larvae. These results suggest that the female-specific enhancement of larval growth by compost was associated with the increased JHBP expression under conditions in which the availability of nutrition from the humus was improved by an increase in potassium ions in the midgut.

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Miscanthus sacchariflorus cultivar:Hercules EF03(01-03)

Project description:Miscanthus sacchariflorus cultivar:Hercules EF03(01-03) Genome sequencing

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Genetic Assessment of Fertile F1 Hybrids between Two Hercules Beetles, Dynastes maya Hardy and D. grantii Horn (Scarabaeidae).

Project description:Although hybridization may complicate taxonomic practices, it can be common between animal species. Animal hybridization not only can help with generating phenotypic and species diversity in nature, but also with understanding the genetic and genomic basis of phenotypic evolution in the laboratory. We assessed the genetic composition of captive bred F1 hybrids between two Hercules beetle species using mitochondrial CO1 and nuclear loci from a double-digest restriction-site associated DNA sequencing (ddRADseq) library. We showed that the F1 hybrids were genetically clustered with samples from the maternal species, D. grantii, based on CO1 data. Nuclear genome data, on the other hand, clearly showed that the F1 individuals were genetically intermediate between D. maya, the paternal species, and D. grantii, based on a principal component analysis. Our results also revealed that sampling design may have a major impact on the inferred genetic structure and hybrid individuals using ddRADseq data sets. We discuss the importance and potential from studying the genomics of this hybrid progeny in terms of understanding the origin and maintenance of both intraspecific and interspecific phenotypic divergence and convergence.

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Long-read Sequencing Data Reveals Dynamic Evolution of Mitochondrial Genome Size and the Phylogenetic Utility of Mitochondrial DNA in Hercules Beetles (Dynastes; Scarabaeidae).

Project description:The evolutionary dynamics and phylogenetic utility of mitochondrial genomes (mitogenomes) have been of particular interest to systematists and evolutionary biologists. However, certain mitochondrial features, such as the molecular evolution of the control region in insects, remain poorly explored due to technological constraints. Using a combination of long- and short-read sequencing data, we assembled ten complete mitogenomes from ten Hercules beetles. We found large-sized mitogenomes (from 24 to 28 kb), which are among the largest in insects. The variation in genome size can be attributed to copy-number evolution of tandem repeats in the control region. Furthermore, one type of tandem repeat was found flanking the conserved sequence block in the control region. Importantly, such variation, which made up around 30% of the size of the mitogenome, may only become detectable should long-read sequencing technology be applied. We also found that, although different mitochondrial loci often inferred different phylogenetic histories, none of the mitochondrial loci statistically reject a concatenated mitochondrial phylogeny, supporting the hypothesis that all mitochondrial loci share a single genealogical history. We on the other hand reported statistical support for mito-nuclear phylogenetic discordance in 50% of mitochondrial loci. We argue that long-read DNA sequencing should become a standard application in the rapidly growing field of mitogenome sequencing. Furthermore, mitochondrial gene trees may differ even though they share a common genealogical history, and ND loci could be better candidates for phylogenetics than the commonly used COX1.

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Project description:Amendment of a thermophile-fermented compost to humus improves the growth of female larvae of the Hercules beetle, Dynastes hercules (Coleoptera: Scarabaeidae)

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